18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 /*
26 * @test
27 * @bug 8196869
28 * @summary Make sure we deal with internal Key data being cleared properly
29 * @run main/othervm -Xms16m -Xmx16m -esa SoftKeys
30 */
31 import java.util.*;
32
33 public class SoftKeys {
34
35 private static final char[] CHARS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
36
37 public static void main(String[] args) {
38 // With 4 characters in "language", we'll fill up a 16M heap quickly,
39 // causing full GCs and SoftReference reclamation. Repeat at least two
40 // times to verify no NPEs appear when looking up Locale's whose
41 // softly referenced data in sun.util.locale.BaseLocale$Key might have
42 // been cleared.
43 for (int i = 0; i < 2; i++) {
44 for (int j = 0; j < 512*1024; j++) {
45 new Locale(langForInt(j), "", "");
46 }
47 }
48 }
49
50 private static String langForInt(int val) {
51 StringBuilder buf = new StringBuilder(4);
52 buf.append(CHARS[(val >> 12) & 0xF]);
53 buf.append(CHARS[(val >> 8) & 0xF]);
54 buf.append(CHARS[(val >> 4) & 0xF]);
55 buf.append(CHARS[(val >> 0) & 0xF]);
56 return buf.toString();
57 }
58 }
59
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18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 /*
26 * @test
27 * @bug 8196869
28 * @summary Make sure we deal with internal Key data being cleared properly
29 * @run main/othervm -Xms16m -Xmx16m -esa SoftKeys
30 */
31 import java.util.*;
32
33 public class SoftKeys {
34
35 private static final char[] CHARS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
36
37 public static void main(String[] args) {
38 try {
39 // With 4 characters in "language", we'll fill up a 16M heap quickly,
40 // causing full GCs and SoftReference reclamation. Repeat at least two
41 // times to verify no NPEs appear when looking up Locale's whose
42 // softly referenced data in sun.util.locale.BaseLocale$Key might have
43 // been cleared.
44 for (int i = 0; i < 2; i++) {
45 for (int j = 0; j < 512*1024; j++) {
46 new Locale(langForInt(j), "", "");
47 }
48 }
49 } catch (OutOfMemoryError e) {
50 // Can happen on some system configurations, and while increasing heap
51 // size would allow GC to keep up, it makes it impractically hard to
52 // reproduce NPE issues that could arise when references are being
53 // cleared. Do a System.gc() to try to reclaim enough memory to not
54 // throw an OOME again in the jtreg wrapper.
55 System.gc();
56 }
57 }
58
59 private static String langForInt(int val) {
60 StringBuilder buf = new StringBuilder(4);
61 buf.append(CHARS[(val >> 12) & 0xF]);
62 buf.append(CHARS[(val >> 8) & 0xF]);
63 buf.append(CHARS[(val >> 4) & 0xF]);
64 buf.append(CHARS[(val >> 0) & 0xF]);
65 return buf.toString();
66 }
67 }
68
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